Well, I'm not really sure where to put this, but since it's Halloween related, I thought that I would start here. I wanted to make some blackish roses - something that started off red and slowly turning black toward the edges for my daughter's halloween costume. Something along the lines of this:

They make floral dyes for flowers, comes in a spray bottle. Might check in the craft stores or online for it. For prom I wanted a black orchid for my date and the florist just sprayed one black with the dye.

Well, I went ahead and purchased some floral spray paint and some (1/2 price) floral bushes today and here's what I got:

The flowers turned out much darker in real life - I'm really happy with the way they turned out. There's still enough red that make them look just like they are starting to decay. The floral spray was extremely easy to use too - thanks for the tip. I'm going to have to remember this for future projects!